Local parts of riverbeds in the Changjiang Estuary have seen intense scouring in recent years,resulting in additional vulnerable section reaching the highest warning level extending from Xintaihai ferry dock to Qiyakou in the south branch of Taicang reach.Based on high-precision field measured hydro-topographic data,this paper reveals several critical changes in the riverbed near bank in this newly identified vulnerable section.Such changes include the southward advance of deep channel,the aggravation of steep bank slope,the increasing of erosion rates,and the upward migration of erosion area.The study also identifies several primary causes for this vulnerable section,including the adjustment of upstream river regime,the decrease of sediment discharge from Changjiang River Basin,and changes in the velocity and direction of flow near riverbank.Based on these findings,the paper proposes targeted countermeasures to address these issues.
关键词
长江口/新险工段/冲刷成因/太仓河段
Key words
Changjiang Estuary/new vulnerable section/cause of erosion/Taicang reach
维普
万方数据